为研究调制周期对薄膜结构和性能的影响,采用多弧离子镀技术在高速钢上制备TiAlN/TiN多层膜,通过改变调制周期制备了不同层数的TiAlN/TiN多层膜,使用扫描电子显微镜(SEM)、XP-2台阶仪、X线衍射仪(XRD)和维氏硬度计对薄膜的表面形貌、厚...为研究调制周期对薄膜结构和性能的影响,采用多弧离子镀技术在高速钢上制备TiAlN/TiN多层膜,通过改变调制周期制备了不同层数的TiAlN/TiN多层膜,使用扫描电子显微镜(SEM)、XP-2台阶仪、X线衍射仪(XRD)和维氏硬度计对薄膜的表面形貌、厚度、物相结构和硬度进行测量,并对实验结果进行分析和讨论.结果表明:TiAlN/TiN多层薄膜中膜层的择优生长方向主要表现为Ti Al N相的(0010)取向;调制周期的改变对薄膜的沉积速率基本没有影响;随着调制周期的减小,样品的表面质量提高,显微硬度明显变大.展开更多
采用多弧离子镀在高速钢基底上沉积Ti Al N薄膜。利用扫描电镜(SEM)观测薄膜的表面形貌;用EDS分析薄膜表面的成分;用表面轮廓仪测试薄膜的厚度并结合沉积时间计算出沉积速率;用维氏硬度仪测量薄膜的硬度;用XRD表征薄膜的微观结构。结果...采用多弧离子镀在高速钢基底上沉积Ti Al N薄膜。利用扫描电镜(SEM)观测薄膜的表面形貌;用EDS分析薄膜表面的成分;用表面轮廓仪测试薄膜的厚度并结合沉积时间计算出沉积速率;用维氏硬度仪测量薄膜的硬度;用XRD表征薄膜的微观结构。结果表明,随着偏压峰值的增大,表面大颗粒逐渐减少,致密性逐渐变好,薄膜硬度也随之增加。沉积参数对薄膜成分有影响,偏压峰值对薄膜中Al含量有较明显的影响,而占空比则主要影响Ti含量。本文对实验结果进行了较详细的讨论和分析。展开更多
Vector beams with spatially varying polarization distribution in the wavefront plane have received increasing attention in recent years. The manipulation of vector beams both in intensity and polarization distribution...Vector beams with spatially varying polarization distribution in the wavefront plane have received increasing attention in recent years. The manipulation of vector beams both in intensity and polarization distributions is highly desired and under development. In this work, we study the transmission property of vector beams through warm rubidium vapor and realize controllable transmission of vector beams based on atomic dichroism. By utilizing the linearly polarized beam and vector beams as the pump and probe beams in a pump–probe configuration, a spatially-dependent dichroism can be obtained,which leads to spatially varied absorption of the probe beam. The controllable intensity distribution of the probe beam, as a two-petal pattern, can rotate with the variation of the pump beam's polarization states. We experimentally demonstrate the mechanism of dichroism with linear polarization light and provide an explanation based on the optical pumping effect.Alternatively, the varying trend of the probe beam's intensity is also interpreted by utilizing the Jones matrix. Our results are thus beneficial for providing potential applications in optical manipulation in atomic ensembles.展开更多
文摘为研究调制周期对薄膜结构和性能的影响,采用多弧离子镀技术在高速钢上制备TiAlN/TiN多层膜,通过改变调制周期制备了不同层数的TiAlN/TiN多层膜,使用扫描电子显微镜(SEM)、XP-2台阶仪、X线衍射仪(XRD)和维氏硬度计对薄膜的表面形貌、厚度、物相结构和硬度进行测量,并对实验结果进行分析和讨论.结果表明:TiAlN/TiN多层薄膜中膜层的择优生长方向主要表现为Ti Al N相的(0010)取向;调制周期的改变对薄膜的沉积速率基本没有影响;随着调制周期的减小,样品的表面质量提高,显微硬度明显变大.
文摘采用多弧离子镀在高速钢基底上沉积Ti Al N薄膜。利用扫描电镜(SEM)观测薄膜的表面形貌;用EDS分析薄膜表面的成分;用表面轮廓仪测试薄膜的厚度并结合沉积时间计算出沉积速率;用维氏硬度仪测量薄膜的硬度;用XRD表征薄膜的微观结构。结果表明,随着偏压峰值的增大,表面大颗粒逐渐减少,致密性逐渐变好,薄膜硬度也随之增加。沉积参数对薄膜成分有影响,偏压峰值对薄膜中Al含量有较明显的影响,而占空比则主要影响Ti含量。本文对实验结果进行了较详细的讨论和分析。
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11774286,11374238,11534008,11604258,and 11574247)China Postdoctoral Science Foundation(Grant No.2016M592771)the Fundamental Research Funds for the Central Universities,China(Grant No.xjj2018213)
文摘Vector beams with spatially varying polarization distribution in the wavefront plane have received increasing attention in recent years. The manipulation of vector beams both in intensity and polarization distributions is highly desired and under development. In this work, we study the transmission property of vector beams through warm rubidium vapor and realize controllable transmission of vector beams based on atomic dichroism. By utilizing the linearly polarized beam and vector beams as the pump and probe beams in a pump–probe configuration, a spatially-dependent dichroism can be obtained,which leads to spatially varied absorption of the probe beam. The controllable intensity distribution of the probe beam, as a two-petal pattern, can rotate with the variation of the pump beam's polarization states. We experimentally demonstrate the mechanism of dichroism with linear polarization light and provide an explanation based on the optical pumping effect.Alternatively, the varying trend of the probe beam's intensity is also interpreted by utilizing the Jones matrix. Our results are thus beneficial for providing potential applications in optical manipulation in atomic ensembles.
